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Old 12-18-17, 07:58 PM
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Join Date: Nov 2007
Location: Yamaguchi City, Japan
Posts: 1,073

Bikes: Trek Madone 5.2 SL 2007, Look KG386, R022 Re-framed Azzurri Primo, Felt Z5, Trek F7.3 FX

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Another pair of Shimano Carbon soled shoes SIDI-fied with heel pads. I got them for 20USD when looking for a cheaper way to purchase cleats (on second hand shoes - sometimes they are cheaper than the cleats on the) for 20USD including postage. I now have 4 pairs of Shimano pro-level hollow carbon soled shoes! The previous owner had shoe gooed the heel (a cosmetic repair) but I did not bother to carbon patch them because the base of the heel is not critical, but a heel pad is, lest you wear all the carbon away.

The process of SIDI-fying (adding a replacable rubber heel) to a pair of carbon sole shoes is

1) Purchase some M5 claw nuts for a bout 1USD

2) Put a M5 bolt into your vice, protruding about 4mm, and screw the claw nut down onto it and then use your angle grinder to grind away 4-5mm of nut to about the height of the claws, and the bolt protruding from your vice.
Grinding Down a Claw Nut by Timothy Takemoto, on Flickr
You have to use the grinder upside down I think so that the nut is not twisted off the bolt. This means that sparks come in your own direction so old clothes are a good idea.
Grinding Down a Claw Nut by Timothy Takemoto, on Flickr
The shorter claw nuts can be used to repair cleat nuts too.

3) Drill a 7mm hole in the heel of your shoes. Do NOT drill the hole as shown in the picture below from the inside because the heel lining can get caught in the chuck and pulled off your shoes! Drill from the outside in, at about the place where there is a Shimano non-replaceable heel pad rivet.
Don't do this by Timothy Takemoto, on Flickr

4) Bed the nut in the inside of the sole in a two/three stage process (this is the only bit that is not obvious) by first bolting down using a cleat nut on the outside. Then, when the cleat bolt starts to turn the claw nut on the interior of the shoe (this can twist the claws cutting a circle in your sole) use a hammer and steel rod to bash the nuts claws into the carbon. Tighten with a cleat bolt again to embed the nut into the interior of the shoe so that you can't feel it when you replace the insole.

5) Bolt a piece of rubber onto your heel with a cleat bolt (I drill a 6mm hole through, and 12mm partial hole first) or purchase a SIDI replacement heel if you want it to look nice.
Adicted to SIDIfying by Timothy Takemoto, on Flickr

Replace the rubber, and the cleat bolt periodically. The super-stiff Shimano shoes, which were ready to go in the dustbin, are good for another decade.
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